8e9989685d
d2dbbba139 converted scyllatop's interperter to Python 3, but neglected to do
the actual conversion. This patch does so, by running 2to3 over allfiles and adding
an additional bytes->string decode step in prometheus.py. Superfluous 2to3 changes
to print() calls were removed.
Message-Id: <20190117124121.7409-1-avi@scylladb.com>